What part of the nervous system is essential for it to work properly?

Which of the following are examples of coordinate headings

Explain what causes the skin to burn in the sun? explain why people should avoid the sun if taking a photosensitive medication?

Insulin is a peptide therapeutic used to manage type 1 diabetes, which affects more than 20 million people worldwide according to the international diabetes federation. a significant limitation to the broad distribution and use of insulin to treat type 1 diabetes is the fact that it must be administered by injection rather than orally. why is insulin administered by injection and not orally?